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tailscale/wgengine/rusage.go

27 lines
740 B
Go

// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package wgengine
import (
"fmt"
"runtime"
"tailscale.com/types/logger"
)
// RusagePrefixLog returns a Logf func wrapping the provided logf func that adds
// a prefixed log message to each line with the current binary memory usage
// and max RSS.
func RusagePrefixLog(logf logger.Logf) logger.Logf {
return func(f string, argv ...interface{}) {
var m runtime.MemStats
runtime.ReadMemStats(&m)
goMem := float64(m.HeapInuse+m.StackInuse) / (1 << 20)
maxRSS := rusageMaxRSS()
pf := fmt.Sprintf("%.1fM/%.1fM %s", goMem, maxRSS, f)
logf(pf, argv...)
}
}